I has asked her about some cash that she owed me from our apartment. She got upset even though she told me she was going to reimburse me for it.

I have not asked her for any cash to help support our son for over 6 months. Yet, I am the bad guy for bringing it up.

I saw the comment as her purposely trying to slow down my self improvement process.

She said all I continue to do is think about myself. How does she know if she's 45 minutes away and only sees me at most twice a week?

I am trying to improve myself. But, I think she just wanted me to feel bad.